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Improper Initialization Affecting kernel-rt-debug-modules-extra package, versions <0:4.18.0-348.2.1.rt7.132.el8_5

Severity

 Recommended
high

Based on CentOS security rating

    Threat Intelligence

    EPSS
    0.04% (6th percentile)

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  • Snyk ID SNYK-CENTOS8-KERNELRTDEBUGMODULESEXTRA-2147709
  • published 26 Sep 2021
  • disclosed 23 Sep 2021
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Introduced: 23 Sep 2021

CVE-2021-20317 Open this link in a new tab
CWE-665 Open this link in a new tab

How to fix?

Upgrade Centos:8 kernel-rt-debug-modules-extra to version 0:4.18.0-348.2.1.rt7.132.el8_5 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-rt-debug-modules-extra package and not the kernel-rt-debug-modules-extra package as distributed by Centos. See How to fix? for Centos:8 relevant fixed versions and status.

A flaw was found in the Linux kernel. A corrupted timer tree caused the task wakeup to be missing in the timerqueue_add function in lib/timerqueue.c. This flaw allows a local attacker with special user privileges to cause a denial of service, slowing and eventually stopping the system while running OSP.

CVSS Scores

version 3.1
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NVD

4.4 medium
  • Attack Vector (AV)
    Local
  • Attack Complexity (AC)
    Low
  • Privileges Required (PR)
    High
  • User Interaction (UI)
    None
  • Scope (S)
    Unchanged
  • Confidentiality (C)
    None
  • Integrity (I)
    None
  • Availability (A)
    High
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Red Hat

4.4 medium